Profile: SK Wiring Products Ltd specializes in providing thermocouples, RTDs, and cables. Glass fibre is a varnished flexible cable insulation that offers heat resistance properties, with the capability of surviving temperatures up to 750 degrees C. Glass fiber cable is used where high temperature insulation resistance is needed. Making glass fibre cables is a relatively slow process, and glass can be an irritant to individuals who are sensitive to it. Glass fibre can be braided or lapped into single cores, twin twisted, flat twins and a variety of screened cables.